TTSForFree
REMOTE · API.TTSFORFREE.COM
Generate AI voices, text-to-speech, subtitles, transcription, and video localization.
Available components
Last scanned (20 hours ago)
Scores higher than 48% of remote servers
Reachable. Last reached 23 Oct 2026.
Category Design and Media
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (remove_favorite_voice). See how to fix → View diagnostics → Fail
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability80
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 2798 tokens (~133/item across 21 items; 21 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management3
- Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage90
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 69% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
- An AI judge read all 22 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 23 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 22 Oct 26 64
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 23 Oct 2026 · Probed https://api.ttsforfree.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=ttsforfree.com | CN=WE1,O=Google Trust Services,C=US | 8 Sept 2026 | 7 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | f3b704cf9eae01b60e0fe5ff3a61718d |
| SANs: ttsforfree.com, *.ttsforfree.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of api.ttsforfree.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| ttsforfree.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://api.ttsforfree.com/mcp | Verified | 200 | |
| http (plaintext) | http://api.ttsforfree.com/mcp | HTTPS enforced | 301 | https://api.ttsforfree.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
add_favorite_voice Add favorite voice ~42
Save a voice to the user's favorites (only when the user asks).
| Name | Type | Req | Description |
|---|---|---|---|
| voice | string | yes | Voice token (v1:...) from list_voices. |
No output schema declared.
No examples provided.
create_upload_url Upload a video/audio file ~182
Get a one-time URL to upload a local video or audio file (mp4, mov, webm, mkv, mp3, wav, m4a...) up to 2 GB. Upload with HTTP PUT of the raw bytes, e.g. `curl -T video.mp4 "<upload_url>"` (valid 15 minutes), then pass `public_url` to transcribe_media or localize_video. Only files uploaded here (or on ttsforfree.com) are accepted; YouTube and other external links are never downloaded. If you cannot run commands, ask the user to upload the file on https://ttsforfree.com/en/video-localization/ and paste the file link.
| Name | Type | Req | Description |
|---|---|---|---|
| file_name | string | yes | Original file name with extension, e.g. lesson-01.mp4 |
| file_size_bytes | integer | – | – |
No output schema declared.
No examples provided.
design_custom_voice Design a custom voice ~151
Create a new personal AI voice from a natural-language description (Gemini Voice Design). Uses one slot of the user's custom-voice quota - confirm with the user first. Good for a unique narrator or a character voice in a video/podcast. Returns the new `voice` token.
| Name | Type | Req | Description |
|---|---|---|---|
| display_name | string | yes | – |
| gender | string | yes | – |
| language_code | string | yes | BCP-47 locale, e.g. en-US, vi-VN. |
| prompt | string | yes | Describe age, accent, timbre, personality, energy and pace. Example: 'Calm male documentary narrator in his 40s, deep warm timbre, slow confident pace, neutral American accent.' |
No output schema declared.
No examples provided.
estimate_video_localization Estimate video dubbing cost ~98
Estimate the credits to dub one video into one or more languages (speech-to-text + translation + voice + video merge) before running localize_video. Pass video_url (duration is measured) or duration_seconds.
| Name | Type | Req | Description |
|---|---|---|---|
| duration_seconds | number | – | – |
| source_language | string | yes | – |
| targets | array | yes | One entry per target language (the server allows 10 per job by default). |
| video_url | string | – | – |
No output schema declared.
No examples provided.
get_account_status Account status ~44
Show the user's plan tier, remaining characters/credits, max characters per request, max blocks per multi-voice/SRT job and API rate limits. Call before large jobs.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_job_detail Job segments (for Remotion / editors) ~78
Get a multi_voice_to_speech or srt_to_speech job with every segment: text, voice and its own audio_url, plus the merged audio. Use it to build captions or a Remotion/NLE timeline (one <Sequence> per segment; measure each file's duration in the renderer).
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | integer | yes | – |
No output schema declared.
No examples provided.
get_job_status Job status ~117
Check a speech job created earlier. Returns status (PENDING | SUCCESS | ERROR) and audio_url once SUCCESS. Never guess or fetch an audio URL before SUCCESS.
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | integer | yes | – |
| job_type | string | yes | single = text_to_speech, multi = multi_voice_to_speech, srt = srt_to_speech. |
| wait_seconds | integer | – | Seconds the server waits for the audio before returning. If the job is still PENDING, call get_job_status later with the returned job_id. |
No output schema declared.
No examples provided.
get_localization_status Video dubbing status ~84
Status of localize_video jobs: current step, and when Completed the dubbed audio_url, final_video_url and translated SRT for each language.
| Name | Type | Req | Description |
|---|---|---|---|
| job_guids | array | yes | – |
| wait_seconds | integer | – | Seconds the server waits for the audio before returning. If the job is still PENDING, call get_job_status later with the returned job_id. |
No output schema declared.
No examples provided.
get_transcription Transcription status ~67
Check a transcribe_media job and get its SRT once finished.
| Name | Type | Req | Description |
|---|---|---|---|
| job_id | integer | yes | – |
| wait_seconds | integer | – | Seconds the server waits for the audio before returning. If the job is still PENDING, call get_job_status later with the returned job_id. |
No output schema declared.
No examples provided.
get_voice_details Voice details ~57
Get full metadata for one voice token: persona, use case, accent, pitch, styles, preview audio and credit cost.
| Name | Type | Req | Description |
|---|---|---|---|
| voice | string | yes | Voice token (v1:...) from list_voices, favorites or custom voices. |
No output schema declared.
No examples provided.
list_favorite_voices My favorite voices ~37
List the voices the user marked as favorites, in their saved order. Check this first when the user did not name a voice.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_languages List languages ~32
List every language supported by TTSForFree text-to-speech. Returns language codes to pass to list_voices.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_my_custom_voices My custom voices ~55
List the user's personal voices created with Voice Design (from a text prompt) or Voice Clone (from an audio sample), plus the remaining custom-voice quota. Use `voice` from the result in any speech tool.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
list_recent_jobs Recent jobs ~46
List the user's most recent speech jobs with status and audio URLs, to reuse earlier audio instead of paying again.
| Name | Type | Req | Description |
|---|---|---|---|
| job_type | string | – | – |
| limit | integer | – | – |
No output schema declared.
No examples provided.
list_voices Find voices ~193
Search the AI voice catalog for one language. Each result has a `voice` token (v1:...) - pass it unchanged as `voice` to text_to_speech, multi_voice_to_speech or srt_to_speech. Results are sorted by popularity; `can_use=false` means the user's plan cannot use that voice. Prefer the user's favorite or custom voices when they exist.
| Name | Type | Req | Description |
|---|---|---|---|
| gender | string | – | – |
| language | string | yes | Language code from list_languages, e.g. en, vi, es, ja. |
| limit | integer | – | – |
| only_usable | boolean | – | Hide voices the current plan cannot use. |
| provider | string | – | Optional voice engine filter. Gemini/OpenAI voices are the most expressive. |
| query | string | – | Optional keywords matched against name, style, persona and use case, e.g. 'warm narrator', 'news', 'young'. |
No output schema declared.
No examples provided.
localize_video Dub a video into other languages ~191
Full automatic dubbing of an uploaded video: transcribe once, translate, voice every target language with its own voice and render a dubbed video per language. Each language returns an audio_url (voice track aligned to the original timeline - upload it to YouTube Studio as a multi-language audio track) and a final_video_url. Takes several minutes: returns job_guids immediately; poll get_localization_status. Confirm the cost with estimate_video_localization for long videos.
| Name | Type | Req | Description |
|---|---|---|---|
| original_audio_volume_percent | integer | – | Keep the original sound (music/effects) under the new voice at this volume in the dubbed video. 0 = remove. |
| source_language | string | yes | Spoken language of the video, e.g. vi. |
| targets | array | yes | One entry per target language (the server allows 10 per job by default). |
| video_url | string | yes | public_url from create_upload_url. |
No output schema declared.
No examples provided.
multi_voice_to_speech Multi-voice audio (podcast / dialogue) ~98
Render ordered segments, each with its own voice, into ONE merged MP3. Use for podcasts, dialogues, interviews, audio dramas or explainer videos with several speakers when there are no fixed timestamps. Consumes credits.
| Name | Type | Req | Description |
|---|---|---|---|
| segments | array | yes | – |
| wait_seconds | integer | – | Seconds the server waits for the audio before returning. If the job is still PENDING, call get_job_status later with the returned job_id. |
No output schema declared.
No examples provided.
remove_favorite_voice Remove favorite voice ~44
Remove a voice from the user's favorites (only when the user asks).
| Name | Type | Req | Description |
|---|---|---|---|
| voice | string | yes | Voice token (v1:...) from list_favorite_voices. |
No output schema declared.
No examples provided.
srt_to_speech Subtitles to speech (video voiceover / dubbing) ~311
Create ONE MP3 that follows a subtitle timeline: every cue starts at its timestamp and speech speed auto-fits the cue duration. Use for video voiceover, dubbing translated subtitles, YouTube localization, tutorials and any edit where audio must line up with existing video. Pass either raw `srt` (SRT or WebVTT text) or `segments` with start_ms/end_ms. For several speakers set `speaker_voices` and prefix cue text with '[Name]' or 'Name:'. The resulting MP3 starts at 00:00 of the video, so it can be muxed directly with ffmpeg (commands are returned). Consumes credits.
| Name | Type | Req | Description |
|---|---|---|---|
| max_speech_rate | number | – | Highest auto-fit speed when a cue is too short for its text. |
| min_speech_rate | number | – | Lowest auto-fit speed. Set min = max for a fixed speed. |
| segments | array | – | Alternative to srt: timed segments. |
| speaker_voices | object | – | Map speaker name -> voice token, e.g. {"Host": "v1:...", "Guest": "v1:..."}. |
| srt | string | – | Full SRT or WebVTT content. |
| voice | string | – | Default voice token for cues without a speaker/voice. |
| wait_seconds | integer | – | Seconds the server waits for the audio before returning. If the job is still PENDING, call get_job_status later with the returned job_id. |
No output schema declared.
No examples provided.
text_to_speech Text to speech ~147
Convert one text into one MP3 with one voice. Use for narration, voiceover scripts, articles, lessons, announcements or any audio whose length can follow the speech. Consumes credits (characters x voice rate). Returns job_id, status and audio_url when ready.
| Name | Type | Req | Description |
|---|---|---|---|
| pitch | number | – | Only some providers support pitch. |
| text | string | yes | Text to read. Plain text; long text is split and merged automatically. |
| voice | string | yes | Voice token (v1:...). |
| wait_seconds | integer | – | Seconds the server waits for the audio before returning. If the job is still PENDING, call get_job_status later with the returned job_id. |
No output schema declared.
No examples provided.
transcribe_media Transcribe video/audio to SRT ~145
Speech-to-text for an uploaded video or audio file: returns timestamped SRT (the timeline to rewrite, translate or re-voice with srt_to_speech). Credits are charged per second of media, measured by the server. Use language = the spoken language code from list_languages.
| Name | Type | Req | Description |
|---|---|---|---|
| language | string | yes | Spoken language code, e.g. vi, en, ja. |
| media_url | string | yes | public_url from create_upload_url (or a ttsforfree CDN link). |
| wait_seconds | integer | – | Seconds the server waits for the audio before returning. If the job is still PENDING, call get_job_status later with the returned job_id. |
No output schema declared.
No examples provided.
How do I install the TTSForFree MCP server?
TTSForFree is a hosted endpoint at https://api.ttsforfree.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · api.ttsforfree.com
claude mcp add --transport http calmnguyen-ttsforfree 'https://api.ttsforfree.com/mcp'
What is the TTSForFree MCP server?
TTSForFree is an MCP server listed in the public MCP registry as io.github.CalmNguyen/ttsforfree. Generate AI voices, text-to-speech, subtitles, transcription, and video localization. This page covers its hosted endpoint (https://api.ttsforfree.com/mcp).
Is the TTSForFree MCP server safe to use?
TTSForFree scores 65 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the TTSForFree MCP server expose?
TTSForFree exposes 21 tools: list_languages, list_voices, get_voice_details, list_my_custom_voices, list_favorite_voices, and 16 more. Their descriptions and schemas cost roughly 2,219 tokens of context every time the server is loaded.
Does the TTSForFree MCP server require authentication?
No. We connected to TTSForFree without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the TTSForFree MCP server still maintained?
TTSForFree is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.